Simplified trigger for loose-leaf binders



July 14, 1953 s, s A 2,645,227

' SIMPLIFIED TRIGGER FOR LOOSE-LEAF BINDERS Filed May 2, 1949 22 22 T I 72 I4 5' I5 75% I J a 24 Patented July 14, 1953 SIMPLIFIED TRIGGER FOR LOOSE-LEAF BINDERS Samuel Segal, New York, N. assignor to Wilson-Jones Company, Chicago, 111., a corporation of Massachusetts Application May 2, 1949, Serial No. 90,842

4 Claims. (01129-24) more particularly to triggers for actuating companion pivoted toggle frames thereof for readily opening the half ring sections merged with the frames. The purpose of the invention is to employ a rockable trigger pivoted on bridge means of a staple having its sides anchored to depending side walls of the casing in which the toggle frames'are pivotally retained. The object of the invention resides in the provision of a simplified bell crank shaped trigger adapted to be quickly assembled in operative relation with the casing. Another object 'is realized in maintaining the bridge of the staple transversely of and within the casing to characterize fulcrum means for the rockable trigger. Another object is to mount the reach and biased portions of the trigger on the bridge retained in place at the juncture or confiuence of the reach and biased portions between the later and stop means of the sheet metal casing. A further object is to utilize lip means extending laterally of the biased or inclined part of the trigger for effectively opening the half ring sections of the companion frames. An'otherspecific object is to provide spaced sockets in the ends, of the companion neck portions of the ends of the frames for interlocking with spaced lip portions of the triggers for automatically opening or closing of half ring sections. Other important objects, advantages and functional and structural features of the invention will appear from the following detailed description taken with the accompanying drawings wherein: r

Fig. 1 is a front elevational view of the leafbinderaccording to my invention.

Fig. 2 is an underneath view taken on the line 2-2 of Fig. 1 illustrating the interlocking pivoted toggle frames and the actuating triggers therefor.

Fig. 2A is an enlarged sectional view on the line 2A-2A of Fig. 2.

Fig. 3 is a transverse sectional view on the line 3-3 of Fig. 1.

Fig. 4 is a longitudinal sectional view on the line 4-4 of Fig. 2.

Fig. 5 is a view similar to Fig. 4 but showing the trigger actuated to openthe half ring sections of the toggle frames.

Fig. 6 is a perspective view of one of the triggers.

Fig. '7 is a transverse sectional view on the line loose 1-1 of Fig. 2.

2 Fig. 10 is a view taken on the line IIl--Ill of Fig. 9.

Fig. 11 is a perspective view ofthe trigger employed in Fig. 9, and

Fig. 12 is a view taken on the line I 2I2:of Fig. 9.

Accordinglt-o the invention the loose leaf binder LB comprisescompanion but opposing toggle frames I0 and II of the type disclosed in U. S. Patent 2,392,508'granted January 8, 1946. These frames are adequately indented to characterize juxtapositioned neck portions I2 and I3 constituting pivoted connections formed by companion recesses I4 and cooperative ribs I5 in these neck portions. j

Toggles l0 and H are disposed within ;the.hollow sheet metal casing I6 havingthe :arcuate top wall I'I provided with the downward converging sides I8 defining spaced longitudinally arranged grooves I 9 with the arched top wall IT. The rectilinear and spaced spans ZO-and 2| of the toggle frames are appropriately retained within the casing I6 for maintaining the pairs of companion neck portions lz and I3 of the toggle frames to gether and inpivotalrelationship whereby these frames can :be rocked or pivoted relative to thev casing IS in the matter of opening or closing the complementary half ring sections 22 and 23 extending from the toggle frames I0 and II through openings-24 and 25 respectively.

For-automatically opening the companion toggle frames; a triggerTis mounted ateach end of the casing. Each trigger in Figs. 1-6 is preferably a one .piece sheet metal member and in the form of=a bell crank-lever C having a manipulatable up-.

standing, arm UA terminating in the finger gripping reflexed portion or terminal 26 and having the offset operating arm AR embodying reach 21 and the downwardly inclined and tapered portion 28 terminating in the lip 29.

When assembled with the casing I6 the triggers T have their lips 29 underneath and abutting companion neck portions I2 and I3 at the ends of the toggle frames I0 and II. The bridge or seat B of a U-shaped wire staple S is approximately at the confluence or juncture of reach 21 and offset or biased portion 28. The spaced legs L of the staple S are arranged in the hollow beads 30 formed by severing end portions of flanges I 8 and rolling the latter to characterize socketsor keepers to prevent transverse shifting of the staple effectively held against longitudinal displacement in that the bridge B is confined between th inclined or biased portion 28 and the biased or inclined stops ST formed when coiling sockets 30.

The manipulating arm UA of a trigger extends through a clearing opening A in the top wall of the casing 16 whereby this arm can be depressed by applying an outward thrust on terminal 26 for rocking or pivoting the trigger about the bridge or fulcrum means B of the fixed staple in the matter of efiectively elevating the biased or inclined part 28, thereby raising lip 29 to abut and actuate interlocking neck portions l2 and [3. By such action the toggle frames are pivoted upwardly relative to casing 16 and formerly closed half ring sections 22 and 23 are promptly opened.

On manually closing of the half ring sections companion end neck portions of the toggles cam lips 29 downwardly and consequently the triggers are tilted about the staples and retracted to their position indicated in Fig. 4.

Openings 25A are provided in the casing which line up with openings 253 in the triggers to receive suitable rivets (not shown) for fixedly attaching the binder to a book or portfolio as is well understood.

In the form according to Figs. 9-12 parts corresponding to the embodiment illustrated in Figs. 1-8 have been primed. In Figs. 9-12 however lip 29' of a trigger has been notched to provide spaced fingers 32 projecting in part into and interlocking with spaced slots or recesses 3| in companion neck portions I2 and 13'. These fingers or laterally extending lip portions 32 are adapted to actuate the companion frames automatically upon manipulation of operating arm UA' in the matter of opening or closing of the half ring sections. In other aspects the form shown in Figs. 9-12 is along the lines illustrated in Figs. 1-8 except in Fig. 9 no refiexed terminal as 26 is provided.

Various changes may be made in details of construction and arrangement of parts without within said casing and having complementary departing from the spirit of the invention or sacrificing any of the advantages thereof inherent therein.

I claim:

1. In a loose leaf binder, a casing having spaced sides, rockable interlocking toggle frames disposed between said sides and having complementary ring sections extending above said casing, a U-shaped member disposed within said sides, said U-shaped member having a bridge and spaced legs, a tiltable trigger having a reach and a downwardly sloping portion defining a juncture pivotally disposed on said bridge, a, lip extending from said sloping portion for actuating said toggle frames, socket means on corresponding end portions of said sides, said sockets terminating adjacent said bridge in end portions slopring sections extending above said casing, bridge mean within and traversing said casing, a trigger in part within said casing and tiltably mounted on said bridge means and including a lip engaging said toggle frames and actuating them to open said ring sections, said casing sides having sloping portions engaging one side of said bridge means, said trigger having a downwardly sloping portion engaging the opposite side of said bridge means and cooperating with the downwardly sloping portions of the casing sides to fixedly retain said bridge means against longi tudinal displacement relative to said casing.

3. In a loose leaf binder, a casing provided with hollow beads extending longitudinally at opposite edges, rockable interlocking toggle members within said casing and having complementary ring sections extending above said casing, bridge means within and traversing said casing, said bridge means comprising a transverse portion of substantially the same width as saidcasing and a pair of longitudinally extending legs extending from opposite ends of said transverse portion, said legs being positioned within said hollow beads, whereby said bridge means is held against vertical or transverse movement, and a trigger in part within said casing and tiltably arranged on said bridge means, said trigger including lip means engageable with said toggle members to actuate them upon tilting movement of trigger in one direction to open said ring sections.

4. A loose leaf binder as recited in claim 2, in which said interlocking frames have spaced recesses at one end thereof, and said lip engaging the toggle frames extends into said recesses.

SAMUEL SEGAL.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,841,793 Dawson Jan. 19, 1932 1,896,840 Dawson Feb. '7, 1933 1,953,981 Trussell Apr. 10, 1934 1,997,447 Birnbaum Apr. 9, 1935 

